When you are writing a formal letter to a company, what information do you include:

Both your address and the Company's address

The correct answer is Option (3) - Both your address and the Company's address

When writing a formal letter to a company, the information you typically include is: Both your address and the Company's address

Your address is included at the top of the letter, usually aligned to the right-hand side, beneath which you write the date.
 The company's address is included below the date, aligned to the left-hand side.
 Your date of birth is generally not necessary unless specifically requested or relevant to the content of the letter.
 Including both your address and the company's address ensures that the letter is properly addressed and facilitates communication between you and the company.